Railway wheel



Jan. 11, 1944. N R 2,338,977

RAILWAY WHEEL Filed Sept. 26, 1939 3 Sheets-Sheet 1 kszav Sean Zdz'eer Jan. 11, 1944. G. SEMBDN'ER ,3 y

' RAILWAY WHEEL Filed Sept. 26. 1939 3 Sheets-Sheet 3 wwg m m r fias Zau Sena Zdzzeb Patented Jan. 11, 1944 Y F I UNITED STATES PATENT OFFICE RAILWAY WHEEL Gustav Sembdner, Berlin-Tempelhof, Germany; vested in the Alien Property Custodian Application September 26, 1939, Serial No. 296,710 In Germany September 26, 1938 8 Claims. (01. 295-15) This invention relates to metallic parts having is engaged in the groove 4 of the rim. Now the improved wear-resistant surfaces and to methods rims I and 3 are welded together by the circular and devices for producing wear-resistant surface Weld 5. The oblique joints between the adjacent layers on metallic parts, more particularly on ends of the rings I and 3 may also be welded wheels for rail-vehicles. 5 together if desired.

It is the object of the invention to incorporate In order to remove the worn-off ring I the wear-resistant material in such a manner into rings I and 3 are separated from each other by the metallic parts that its structure and strength a cutting torch applied to the seam 5. is not changed, at least not deteriorated. Referring now to Fig. 2, the reference numerals Another object of the invention is to attach or I to 5 designate the same parts as in Fig. 1. Adsecure the wear-resistant layer to the metallic ditionally a ring 6 is provided which is threaded part or support in such a manner that While an at I and screwed on a threaded portion 2 of the undesired or inadvertent detachment or loosenrim so as to engage into a dovetail portion 8 of ing is absolutely prevented, it is possible to rethe rim I. The joints of the strips I and 3 may place or detach the wear-resistant layer with again be welded together if desired. It will be simple means, if desired. understood that the strip I is thus still more Another object of the invention is to provide reliably secured on the rim 2. simple devices and apparatus for applying the In order to remove the ring I the ring 6 is wear-resistant layers to and for removing same unscrewed and the ring I is separated from the from, their support. ring 3 by a cutting torch applied at 5.

A special object of the invention is to increase Referring now to Fig. 3, the ring I is in this the durability of wheels and wheel sets for railcase engaged over the rim 2 in the direction of way cars. the arrow so as to engage the annular groove 9 According to the invention a Wear resistant of the rim by its inner collar 8. This is possible strip is applied to the work piece in the form by the Spring acti of the Op ring The Open of one or several pieces and secured in position ring is now closed at the joint by welding whereon the work piece by recessed or indented porby the r ng I i Secured against inadvertent tions in the work piece and in the strip. Special tachment. Moreover, in case of high stresses a closure members, such as looking rings or the threaded ring 6 may be applied which in this like may be used additionally. The toothed case may press against the annular surface 8 engagement of the parts may be completed by a without dovetail engagement.

ring which is welded together with a wear re- In order to remove the ring I from the rim sistant plating. Moreover, screw rings, bayonet the joint is out and the thread d ri 5 is u fixing rings or smooth rings attached by riveting screwed.

may be used for this purpose. Further, it is pos- A similar arrangement is shown in Fig. 4, howsible to provide the toothed engagement between ever, in this case a circular ring I II which is conthe work piece and the Wear resistant plating nected to the rim 2 by a number of rivets I I by composing the Wear resistant surface of single serves as an additional securing means in place pieces which are welded together. Moreover, it of a threaded ring 6. is contemplated to provide resilient insertions In this case the ring I is removed by cutting between the work piece and the wear resistant the joint and withdrawing the circular ring I0 plating whereby it is rendered possible, for inafter removal of the rivets II. stance, to provide running wheels of steel which Referring now to Figs. 5 and 6 showing the h v a p ng action. wheel rim in a cross sectional and side elevation, My invention permits a great simplification in respectively, it will be seen that the wear re-' the manufacture and operation of work pieces sistant plating is in this case made of two pieces having surfaces subjected to heavy wear and tear. I and I" which are welded together at 50. A For example, railway and tramway wheels, runsecuring ring I9 is attached to the rim 2 by ning wheels for cranes and the like can be easily means of a device which is similar to a bayonet and safely provided with new running surfaces fixing comprising claws I9 and 2 on the ring I9 when they are worn off. and on the rim 2, respectively. The claws I8 of The invention will be better understood by the ring I9 are at first engaged through recesses reference to the following detailed description 2" between the claws 2' and then looked behind in connection with the accompanying drawings the claws 2' by rotation through a small angle.

showing by way of example and. diagrammatically The ring I which is attached to the rim 2 in the some embodiments of the invention, viz: direction" of the arrow may be removed from the Fig. 1 is a cross sectional view of the outer same by cutting the joint 50 and releasing the portion of a wheel rim. A profiled strip I of ring I9.

hardened steel is engaged over the rim 2 in the Referring now to Fig. '7, the annular strip in direction of the arrow and an open steel ring 3 this case consists of two portions I' and I" or cal groove. As shown in Fig. 19, the wedge strip 50 consists of a plurality of pieces which are inserted in succession whereby the half rings 41 are safely secured in position. The closure member 51 of the wedge ring 50 is locked against inadvertent falling out, as by insertion of a filling member 52 secured by spot Welding or screws. In this manner the remaining pieces 50 of the wedge ring and thus the half rings 41 are locked against inadvertent releasing. The two oblique joints 53 of the half rings 41 need not be welded. When the half rings 41 are worn off they may be detached and exchanged by removal of the filling member 52 and by forcing out the wedge mem bers and 50. This interchange can be effected without detaching the wheel set from the car, in such a manner that there is first interchanged the upper half ring and then, on rotation of the wheel through 180, the lower half ring.

Figs. 20 to 22 illustrate a running wheel of a crane comprising two half rings which are applied in the manner indicated in Fig. 11, but while the two joints must be welded in Fig. 11, the ends of the two half rings 54 according to Figs. 20 to 22 are tightly secured to the wheel rim 6| by means of a wedge or dovetail joint so that the two oblique joints 55 do not require to be welded.

Fig. 20 is a cross sectional view of the wheel rim 6! on line A-A of Fig. 21. Fig. 21 is a fragmentary longitudinal section through the rim on the joint 55 of the half rings, on the line BB of Fig. 22. Fig. 22 shows a plan view on the same joint with the half rings omitted. The grooves 55 which are undercut on one side are worked into both ends of the two half rings 54.

Provided in the wheel rim 6i are four undercut oblique grooves 51 in which the four wedge members 53 are guided. The wedge members 58 carry a hook-shaped projection 59 each on their upper side which engages the grooves 56 as the wedge members 58 are forced in and thereby secures the half rings 54 at their ends with the wheel rim 6!. The bores 6!) permit the introduction of a tool for forcing out the wedges 58.

In any of the above described embodiments where half rings are to be welded at their joints the dovetail joint described with reference to Fi s. 20 to 22 may be used instead of a welded joint whereby the interchange of the half rings is greatly facilitated and welding and cutting of the welds is rendered unnnecessary.

The wear resistant plating may be steel which is improved or alloyed in any known manner, for instance, manganese steel containing 12-14% manganese, steel containing chromium and nickel or vanadium. Other than steel alloys may also be used, for instance, metals of the hard metal group, such as tungsten carbide or the like. Furthermore, where the wear is due to chemical attacks, platings of anti-corrosive or non-rusting material may be employed. The coefiicient of thermal expansion of the wear-resistant material should be at least approximately similar to the corresponding coefficient of the metallic support. When applied to a wheel my invention offers the special advantage that the wear resistant plating may be exchanged with the wheel in operative position whereby time and labour is saved.

The method of the present invention has been described in detail with reference to specific embodiments. It is to be understood, however, that the invention is not limited by such specific reference but is broader in scope and capable of other embodiments than those specifically described and illustrated in the drawings.

I claim:

1. A wheel including a rim portion, a wearresistant plating for said rim portion comprising at least two separate transversely divided rings independently mountable on the rim portion of said wheel, and means for securing all said rings in coacting relation on said rim portion to form a running surface for said wheel.

2. A wheel including a rim portion, a wearresistant plating on said rim portion forming the running surface of said wheel, said plating being composed of a plurality of transversely divided rings disposed on said rim portion in coacting relation, and means for retaining said rings in positon on said rim portion in non-integral relationship so that said rings may be individually removed and the running surface of said wheel renewed, with said wheel in operative position, by individually replacing said rings and restoring said retaining means.

3. A wheel as set forth in claim 2 with said securing means including welded connections between said rings, said rings being transversely severable for renewal of the running surface of said wheel.

4. A wheel as set forth in claim 2 with said rings forming two sets circumferentially in parallel and spaced a limited distance; and with said retaining means including undercut recesses in said rim portion engaged by corresponding portions of said rings, and means disposed between said sets of rings for maintaining the corresponding portions of said rings in said recesses.

5. A wheel as set forth in claim 2 with said rings forming two sets circumferentially in parallel and spaced a limited distance; and with said retaining means including undercut recesses in said rim portion engaged by corersponding portions of said rings, partition means on said rim portion intermediate said sets of rings, and means disposed between said sets of rings and enveloping said partition means for maintaining the corresponding portions of said rings in said recesses.

6. A wheel as set forth in claim 2 with said retaining means including transversely arranged wedge shaped elements disposed between said rings and the rim portion of said wheel and operative to secure the rings in position on said rim portion.

7. A wheel as set forth in claim 2 with said retaining means including an undercut recess in the periphery of said rim portion engaged by corresponding portions of said rings, and coacting transversely arranged wedge shaped elements disposed between said rings and the rim portion of said wheel in opposite relation to said undercut recess and operative to secure the rings in position on said rim portion.

8. A wheel as set forth in claim 2 with said retaining means including transversely arranged wedge shaped elements disposed between said rings and the rim portion of said wheel at the respectively opposite ends of said rings and operative to secure the rings in position on said rim portion.

GUSTAV SEMBDNER. 

